[R] Plotting Multiple lines on one plot
R_Learner
Hi,
I'm trying to plot multiple lines on one plot. I have a data frame raw,
and i want to plot raw$date on the x-axis and raw$theta, raw$vega,
raw$delta, and a few others on the y-axis, with a legend. However, I'm not
sure what the scale of those data sets are, and I don't know which one will
have the largest scale. How can I plot this? I've tried ggplot (qplot), but
it doesn't seem to be capable of multiple lines.
Thanks!
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RichardP
You can set the range for each axis on your plot using the ylim and xlim
parameters (use help to see how to implement them). You can find the range
or minimum and maximum for each variable (or a number of variables at once)
using the min and max commands.
If you're ranges vary too much though it will be hard to visualise all the
data on the same axis.
R_Learner wrote:
>
> Hi,
> I'm trying to plot multiple lines on one plot. I have a data frame raw,
> and i want to plot raw$date on the x-axis and raw$theta, raw$vega,
> raw$delta, and a few others on the y-axis, with a legend. However, I'm not
> sure what the scale of those data sets are, and I don't know which one
> will have the largest scale. How can I plot this? I've tried ggplot
> (qplot), but it doesn't seem to be capable of multiple lines.
>
> Thanks!
>
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hadley wickham
dfm <- melt(df, id = "date", measure = c("theta","vega","delta"))
qplot(date, value, data=dfm, geom="line", colour = variable)
Hadley